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MALPEDIA_Win_Xagent_Auto

autogenerated rule brought to you by yara-signator

MalwareXagentMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Xagent.

It defines 26 patterns (0 text, 26 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-xagent-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xagent_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e6749351-2438-58b5-875e-9b65c6d4bb5f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.xagent"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xagent_auto.yar#L1-L244"
		license_url = "N/A"
		logic_hash = "108c073665fdca68ab6c156d2bd80d154df30e277e99e8f7d93b99eb208d6ddb"
		score = 75
		quality = 73
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { c1ea02 6bd20d b801000000 2bc2 }
		$sequence_1 = { ff15???????? 8bd8 e8???????? 03d8 }
		$sequence_2 = { ff460c 03ff 03ff 3b7e0c 7707 c7460c00000000 49 }
		$sequence_3 = { c7460c00000000 49 894e10 7507 c7460c00000000 }
		$sequence_4 = { c20400 8d4de4 e8???????? b8???????? c3 83c8ff }
		$sequence_5 = { 8b0482 8b0488 8b4e10 85c9 7423 8b7e08 ff460c }
		$sequence_6 = { e8???????? 8b4604 85c0 7407 8b4d08 8b11 }
		$sequence_7 = { 8b7a08 c1e802 83e103 3bf8 7702 2bc7 8b5204 }
		$sequence_8 = { ff15???????? 6a08 e8???????? 83c404 85c0 }
		$sequence_9 = { eb02 8b11 8b4808 8bc1 57 8b7a08 c1e802 }
		$sequence_10 = { 740c 488b07 488b0b 488903 48890f 488b5c2430 488b6c2438 }
		$sequence_11 = { 740c 488b07 4c8b13 488903 4c8917 488b13 488b0e }
		$sequence_12 = { 4883792800 498bf9 498bf0 488bea }
		$sequence_13 = { e8???????? 48833b00 740a 488b4308 }
		$sequence_14 = { e8???????? 488b4328 4c8bcf 4c8bc6 }
		$sequence_15 = { e8???????? 90 0fb705???????? 6689442420 }
		$sequence_16 = { 7509 488b03 488bcb ff5008 488b7d8f }
		$sequence_17 = { 4053 4883ec20 488b5910 4885db 7416 }
		$sequence_18 = { b803b57ea5 f7e6 c1ea06 6bd263 }
		$sequence_19 = { 75f8 492bca 4963c1 483bc1 }
		$sequence_20 = { 75f8 492bc9 8bc3 483bc1 737f 4c8b4718 }
		$sequence_21 = { 75f8 492bdc 498bfe 4d85f6 }
		$sequence_22 = { 75f8 492bfc 498bf5 4d85ed }
		$sequence_23 = { 75f8 492bf5 ff15???????? 8d0c3e }
		$sequence_24 = { 75f8 492bdd 488bf7 4885ff }
		$sequence_25 = { 75f8 492bf5 488bfb 4885db }

	condition:
		7 of them and filesize < 729088
}

Strings (26 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c1ea02 6bd20d b801000000 2bc2 }
$sequence_1hex{ ff15???????? 8bd8 e8???????? 03d8 }
$sequence_2hex{ ff460c 03ff 03ff 3b7e0c 7707 c7460c00000000 49 }
$sequence_3hex{ c7460c00000000 49 894e10 7507 c7460c00000000 }
$sequence_4hex{ c20400 8d4de4 e8???????? b8???????? c3 83c8ff }
$sequence_5hex{ 8b0482 8b0488 8b4e10 85c9 7423 8b7e08 ff460c }
$sequence_6hex{ e8???????? 8b4604 85c0 7407 8b4d08 8b11 }
$sequence_7hex{ 8b7a08 c1e802 83e103 3bf8 7702 2bc7 8b5204 }
$sequence_8hex{ ff15???????? 6a08 e8???????? 83c404 85c0 }
$sequence_9hex{ eb02 8b11 8b4808 8bc1 57 8b7a08 c1e802 }
$sequence_10hex{ 740c 488b07 488b0b 488903 48890f 488b5c2430 488b6c2438 }
$sequence_11hex{ 740c 488b07 4c8b13 488903 4c8917 488b13 488b0e }
$sequence_12hex{ 4883792800 498bf9 498bf0 488bea }
$sequence_13hex{ e8???????? 48833b00 740a 488b4308 }
$sequence_14hex{ e8???????? 488b4328 4c8bcf 4c8bc6 }
$sequence_15hex{ e8???????? 90 0fb705???????? 6689442420 }
$sequence_16hex{ 7509 488b03 488bcb ff5008 488b7d8f }
$sequence_17hex{ 4053 4883ec20 488b5910 4885db 7416 }
$sequence_18hex{ b803b57ea5 f7e6 c1ea06 6bd263 }
$sequence_19hex{ 75f8 492bca 4963c1 483bc1 }
$sequence_20hex{ 75f8 492bc9 8bc3 483bc1 737f 4c8b4718 }
$sequence_21hex{ 75f8 492bdc 498bfe 4d85f6 }
$sequence_22hex{ 75f8 492bfc 498bf5 4d85ed }
$sequence_23hex{ 75f8 492bf5 ff15???????? 8d0c3e }
$sequence_24hex{ 75f8 492bdd 488bf7 4885ff }
$sequence_25hex{ 75f8 492bf5 488bfb 4885db }

Condition

7 of them and filesize < 729088

In plain words (Heuristic)

  • The file must be smaller than 729088 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: e6749351-2438-58b5-875e-9b65c6d4bb5f

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE